Shareholder Engagement

SHAREHOLDER ENGAGEMENT APRIL 2019 Allergan Cautionary Statements Forward Looking Statements This communication includes statements that refer to estimated or anticipated future events and are forward looking statements. We have based our forward looking statements on management’s beliefs and assumptions based on information available to our management at the time these statements are made. Such forward looking statements reflect our current perspective of our business, future performance, existing trends and information as of the date of this filing. These include, but are not limited to, our beliefs about future revenue and expense levels and growth rates, prospects related to our strategic initiatives and business strategies, including the integration of, and synergies associated with, strategic acquisitions, express or implied assumptions about government regulatory action or inaction, anticipated product approvals and launches, business initiatives and product development activities, assessments related to clinical trial results, product performance and competitive environment, and anticipated financial performance. Without limiting the generality of the foregoing, words such as “may,” “will,” “expect,” “believe,” “anticipate,” “plan,” “intend,” “could,” “would,” “should,” “estimate,” “continue,” or “pursue,” or the negative or other variations thereof or comparable terminology, are intended to identify forward looking statements. The statements are not guarantees of future performance and involve certain risks, uncertainties and assumptions that are difficult to predict. We caution the reader that these statements are based on certain assumptions, risks and uncertainties, many of which are beyond our control. In addition, certain important factors may affect our actual operating results and could cause such results to differ materially from those expressed or implied by forward looking statements. These factors include, among others, the effects of any changes to management or corporate governance, the inherent uncertainty associated with financial projections; the anticipated size of the markets and continued demand for Allergan’s existing products; Allergan’s ability to successfully develop and commercialize new products; Allergan’s ability to conform to regulatory standards and receive requisite regulatory approvals; availability of raw materials and other key ingredients; uncertainty and costs of legal actions and government investigations; fluctuations in Allergan’s operating results and financial condition, particularly given our manufacturing and sales of branded products; the impact of uncertainty around of timing of generic entry related to key products, including Restasis ®, on our financial results; risks associated with acquisitions, mergers and joint ventures, risks related to impairments, uncertainty associated with financial projections, projected cost reductions, projected synergies, restructurings, increased costs, and adverse tax consequences; expectations regarding contingent payments, including regarding litigation and related liabilities, purchase price adjustment or transaction consideration payments; the results of the ongoing business following the completion of the divestiture of Allergan’s generics business to Teva; the adverse impact of substantial debt and other financial obligations on the ability to fulfill and/or refinance debt obligations; risks associated with relationships with employees, vendors or key customers as a result of acquisitions of businesses, technologies or products; our compliance with federal and state healthcare laws, including laws related to fraud, abuse, privacy security and others; generic product competition with our branded products; uncertainty associated with the development of commercially successful branded pharmaceutical products; costs and efforts to defend or enforce technology rights, patents or other intellectual property; expiration of patents on our branded products and the potential for increased competition from generic manufacturers; competition between branded and generic products; Allergan’s ability to obtain and afford third-party licenses and proprietary technology we need; Allergan’s potential infringement of others’ proprietary rights; our dependency on third-party service providers and third-party manufacturers and suppliers that in some cases may be the only source of finished products or raw materials that we need; Allergan’s competition with certain of our significant customers; the impact of our returns, allowance and chargeback policies on our future revenue; successful compliance with governmental regulations applicable to Allergan’s and Allergan’s respective third party providers’ facilities, products and/or businesses; the difficulty of predicting the timing or outcome of product development efforts and regulatory agency approvals or actions, if any; Allergan’s vulnerability to and ability to defend against product liability claims and obtain sufficient or any product liability insurance; Allergan’s ability to retain qualified employees and key personnel; the effect of intangible assets and resulting impairment testing and impairment charges on our financial condition; Allergan’s ability to obtain additional debt or raise additional equity on terms that are favorable to Allergan; difficulties or delays in manufacturing; our ability to manage environmental liabilities; global economic conditions; Allergan’s ability to continue foreign operations in countries that have deteriorating political or diplomatic relationships with the United States; Allergan’s ability to continue to maintain global operations and the exposure to the risks and challenges associated with conducting business internationally; risks associated with tax liabilities, or changes in U.S. federal or international tax laws to which we are subject, including the risk that the Internal Revenue Service disagrees that Allergan is a foreign corporation for U.S. federal tax purposes; risks of fluctuations in foreign currency exchange rates; risks associated with cyber-security and vulnerability of our information and employee, customer and business information that Allergan stores digitally; Allergan’s ability to maintain internal control over financial reporting; changes in the laws and regulations, affecting among other things, availability, pricing and reimbursement of pharmaceutical products; the highly competitive nature of the pharmaceutical industry; Allergan’s ability to successfully navigate consolidation of our distribution network and concentration of our customer base; the difficulty of predicting the timing or outcome of pending or future litigation or government investigations; developments regarding products once they have reached the market; risks related to Allergan’s incorporation in Ireland, such as changes in Irish law and such other risks and other uncertainties detailed in Allergan’s periodic public filings with the Securities and Exchange Commission, including but not limited to Allergan’s Annual Report on Form 10-K for the year ended December 31, 2018 and from time to time in Allergan’s other investor communications. Except as expressly required by law, Allergan disclaims any intent or obligation to update or revise these forward-looking statements. Non-GAAP Financial Measures This document contains non‐GAAP financial measures. The Appendix hereto presents reconciliations of certain non‐GAAP financial measures to the most directly comparable GAAP measures. The non‐GAAP measures include non-GAAP net revenue, non-GAAP net revenue growth, non-GAAP R&D expense, non-GAAP performance net income per share growth, non-GAAP gross margin, non-GAAP operating margin, non-GAAP operating income, non-GAAP net debt to adjusted EBITDA ratio, total debt to EBITA ratio, total debt and other non-GAAP financial statement line items. The Company believes that its non-GAAP measures provide useful information to investors because these are the financial measures used by our management team to evaluate our operating performance, make day to day operating decisions, prepare internal forecasts, communicate external forward looking guidance to investors, compensate management and allocate the Company’s resources. We believe this presentation also increases comparability of period to period results. The Company’s determination of significant charges or credits may not be comparable to similar measures used by other companies and may vary from period to period. The Company uses both GAAP financial measures and the disclosed non-GAAP adjusted financial measures internally. These non-GAAP adjusted financial measures are in addition to, not a substitute for, or superior to, measures of financial performance prepared in accordance with GAAP. 2 Why We Are Engaging with You Today Appaloosa has submitted a shareholder proposal seeking an immediate change to our leadership structure that would create significant uncertainty as we continue executing a strategic transformation from a generics company to a global branded biopharma company focused on four key therapeutic areas. Our Board strongly recommends AGAINST this proposal for the reasons outlined in this presentation: 1• Allergan has a deeply-engaged, effective and independent Board with high-caliber Directors, a robust Lead Independent Director role and a demonstrated commitment to active board refreshment and rigorous governance guidelines 2• The Board has recently adopted an Independent Board Chair policy in our governance documents,

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